Valiant66 - To lose one disc drive is unfortunate, to lose two disc drives is careless, to lose three disc drives...........
You must have had a lightning strike or a power surge. In which case I would expect at least one to be recoverable by the right people but they charge quite a lot and they didn't get mine back when I had a head crash. But you NEVER get 3 head crashes all at the same time. I only came across 3 in 25 years in IT.
Now for the old 'real Mathematicians use reverse polish' debate. A mate of mine (an electrical engineer) was a great fan of all Sinclair's products and had a bedroom full of kits. He was always trying to persuade me that RP was easier, more intuitive once you got used to it, much better in fact. To put it charitably, I was a little sceptical. (Why did an image of a USB cable just flash past?).
If any of you are Mathematicians then you will already know the correct riposte to this reverse polish nonsense. For those of you who are not Mathematicians the correct riposte is 'no they do not, they use slide rules'.